Which of the following will tend to reduce the size of a confidence interval?
A) Decrease the significance level (alpha).
B) Increase the sample size
C) Decrease the standard deviation of the population
D) You can't do anything to reduce the interval

Question

Quizplus · Accepted Answer

Increasing the sample size will reduce the size of the confidence interval as it will result in a more precise estimate of the population parameter. The other choices (A and C) are incorrect as they will either increase or have no effect on the size of the confidence interval. The final choice (D) is also incorrect as there are methods to reduce the size of the confidence interval.

Which of the Following Will Tend to Reduce the Size